Sidewall rubber composition resistant to early wax spraying in high humidity and heat environment and preparation method thereof

A hot and humid environment, sidewall rubber technology, applied to special tires, tire parts, transportation and packaging, etc., can solve problems such as early blooming, reduce the probability of tire whitening, reduce the occurrence of cracks, and prevent anti-aging The effect of performance degradation

Active Publication Date: 2021-07-27
SAILUN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of early blooming on the tire surface under the high humidity and heat environment existing in the prior art, and propose a sidewall rubber composition and preparation method thereof which are resistant to early blooming under the high humidity and heat environment. Formula raw materials and components, and adopt a new type of modified protective wax HG72 to achieve the purpose of anti-early wax spraying and long-term protection in high-humidity environment, suitable for high-temperature and high-humidity (temperature ≥ 35 ℃, humidity ≥ 60%) environment It effectively guarantees the long-term ozone resistance of the tire, and can avoid the early wax spraying of the finished tire, which plays a long-term protection role

Method used

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  • Sidewall rubber composition resistant to early wax spraying in high humidity and heat environment and preparation method thereof
  • Sidewall rubber composition resistant to early wax spraying in high humidity and heat environment and preparation method thereof
  • Sidewall rubber composition resistant to early wax spraying in high humidity and heat environment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] One-stage mastication: add all the natural rubber, high-cis butadiene rubber and 1 / 2-2 / 3 carbon black into the internal mixer, press the top bolt and mix for 30 seconds, raise the top bolt, press and knead For 25s, lift the top bolt to clean, press the top bolt to mix for 25s, open the discharge door to remove the glue, control the glue removal temperature to 140°C, the speed of the internal mixer is 50 rpm, open the mixer to unload, cool and build, and get a section of rubber mix;

[0033]Two-stage mixing: add the obtained first-stage plasticizing rubber, all remaining carbon black, and all tackifying resins, stearic acid, zinc oxide, environmentally friendly aromatic oil, modified protective wax, anti-aging agent RD and anti-aging agent 4020 In the internal mixer, press the top bolt to mix for 40 seconds, raise the top bolt to clean for 5 seconds, press the top bolt to mix for 30 seconds, open the discharge door to discharge glue, control the glue discharge temperatur...

Embodiment 2

[0037] One-stage mastication: add all the natural rubber, high-cis butadiene rubber and 1 / 2-2 / 3 carbon black into the internal mixer, press the top bolt and mix for 25 seconds, raise the top bolt, press and knead For 20s, lift the top bolt to clean, press the top bolt to mix for 20s, open the discharge door to remove the glue, control the glue removal temperature to 135°C, the speed of the internal mixer to 40 rpm, open the mixer to unload, cool and build, and get a section of rubber mix;

[0038] Two-stage mixing: add the obtained first-stage plasticizing rubber, all remaining carbon black, and all tackifying resins, stearic acid, zinc oxide, environmentally friendly aromatic oil, modified protective wax, anti-aging agent RD and anti-aging agent 4020 In the internal mixer, press the top bolt to mix for 35 seconds, raise the top bolt to clean for 5 seconds, press the top bolt to mix for 25 seconds, open the discharge door to discharge glue, control the glue discharge temperatu...

Embodiment 3

[0042] One-stage mastication: add all the natural rubber, high-cis butadiene rubber and 1 / 2-2 / 3 carbon black into the internal mixer, press the top bolt and mix for 35 seconds, raise the top bolt, press and knead For 30s, lift the top bolt to clean, press the top bolt to mix for 30s, open the discharge door to remove the glue, control the glue removal temperature to 145°C, the speed of the internal mixer is 60 rpm, open the mixer to unload, cool and build, and get a section of rubber mix;

[0043] Two-stage mixing: add the obtained first-stage plasticizing rubber, all remaining carbon black, and all tackifying resins, stearic acid, zinc oxide, environmentally friendly aromatic oil, modified protective wax, anti-aging agent RD and anti-aging agent 4020 In the internal mixer, press the top bolt to mix for 45 seconds, raise the top bolt to clean for 5 seconds, press the top bolt to mix for 35 seconds, open the discharge door to discharge glue, control the glue discharge temperatu...

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Abstract

The invention belongs to the field of rubber compound production for all-steel radial tires, in particular to a sidewall rubber composition resistant to early wax spraying in a high-humidity-heat environment and a preparation method thereof. The rubber composition comprises the following raw materials in parts by weight: 60-40 parts of natural rubber, 40-60 parts of high cis-butadiene rubber, 40-55 parts of carbon black, 3.0-5.5 parts of zinc oxide, and 1.5-3.0 parts of stearic acid , 0.5-1.5 parts of antioxidant RD, 1.5-3.0 parts of antioxidant 4020, 3.0-5.0 parts of environmentally friendly aromatic oil, 3.0-5.0 parts of tackifying resin, 1.5-3.0 parts of insoluble sulfur, 0.8-1.5 parts of accelerator NS, modified 1.5 to 2.5 copies of protective wax. The invention selects appropriate formula materials and components, and adopts a new type of modified protective wax HG72, so as to achieve the purpose of anti-early blooming and long-term protection of tires under high humidity and heat environment.

Description

technical field [0001] The invention relates to the field of rubber compound production for all-steel radial tires, in particular to a sidewall rubber composition resistant to early wax spraying in a high-humidity environment and a preparation method thereof. Background technique [0002] Tires will be in contact with trace amounts of ozone contained in the air during daily use. Ozone molecules can react with the double bonds in diene rubber molecules to form broken bonds, which will cause aging cracks in the rubber and continue to develop in depth, resulting in rubber The damage of the product makes it lose its use value prematurely. In order to avoid the damage of ozone to the tire sidewall rubber, people usually add a certain amount of protective wax to the sidewall rubber composition to protect the rubber against static ozone attack by migrating the wax to the tire rubber surface to form a film or physical barrier. With the use of the tire, the wax in the rubber continu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L9/00C08L91/06C08K13/02C08K3/22C08K3/04C08K3/06C08K5/09B60C1/00
CPCB60C1/0025C08K2003/2296C08L7/00C08L9/00C08L91/06C08K13/02C08K3/22C08K3/04C08K3/06C08K5/09
Inventor 王诗凝周天明冯杰李雯张文博任衍峰
Owner SAILUN GRP CO LTD
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